I added a menu link in main menu:
user/%/notifications/subscription. The menu is never visible except that when a user goes to his subscription page via 'My Account'. The menu link is not available when I try to edit the main menu links. It is not there. This problem surfaced up after I installed Menu Token module. However, I committed the sin before installing the Menu Token] module. I have uninstalled this module.
Additionally, user gets the following error when visiting
"Notice: Undefined index: localized_options in menu_navigation_links() (line 1858 of /home/carrotjo/public_html/includes/menu.inc)."
After some search on the Internet, I commented out
$l = $item['link']['localized_options']; (line 1857 in menu.inc). The error is gone. But the ghost appears in the main menu link.